Exhaust waste heat recovery device

An exhaust heat recovery device comprising:

• an exhaust pipe through which exhaust flows;
• a heat recovery material arranged in the exhaust pipe, comprising through holes independent from one another, and recovering heat of the exhaust;
• a heat medium flow passage formed in an annular shape and arranged outside an outer periphery of the heat recovery material, the heat medium flow passage being structured such that heat medium flows through the heat medium flow passage, and directly recovers by thermal conduction the heat recovered by the heat recovery material;
• and
• an exhaust restriction portion arranged in the exhaust pipe and suppressing a flow of the exhaust to through holes of the through holes adjacent to the heat medium flow passage,
• wherein the exhaust restriction portion
• is arranged upstream of the heat recovery material in a flow direction of the exhaust, and
• has a tubular shape with an inner diameter smaller than an outer diameter of the heat recovery material, and
• wherein the heat recovery material consists of
• first wall portions extending in the flow direction of the exhaust, and
• second wall portions intersecting with the first wall portions, the first wall portions and the second wall portions forming through holes extending in the flow direction of the exhaust.